So I found out that the webadmin port (call it X) is picking up on all external subinterfaces of my firewalls (120/320 v 8.305).
There does not appear to be a way to prevent this without adding two firewall rules - one to permit all traffic to that port from appropriate networks on just the WAN interface and one to block all other access to that port from unknown sources on the remaining networks (ALL).
Anyone else have an easy fix for this?
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